Spitting up is very common in infants and toddlers, and may be caused by excessive feeding, as well as by food accumulation, indigestion or gastrointestinal digestive insufficiency and other pathological causes. The cause of vomiting can usually be identified and treated accordingly. In children, the stomach is horizontal and the sphincter between the stomach and esophagus is not well developed compared to that of adults, so excessive feeding, crying during feeding or inhaling too much air can lead to vomiting. It is a normal physiological phenomenon and there is no need to worry too much. It is recommended to pick up the child after each feeding and pat him/her on the back, and the symptoms will gradually improve as the child grows older. In addition to physiological factors, some children can be caused by pathological factors, such as pyloric spasm, intestinal entrapment, constipation, intestinal roundworm disease, etc. Spitting up can occur. In addition, if the child is formula-fed, it is recommended not to brew the formula too thickly to avoid accumulation of food and induce vomiting. If the child’s abdomen is found to be swollen, the child can be given an appropriate amount of probiotics to regulate his intestinal flora.